JPH0284801A - Cavity resonator - Google Patents

Abstract

PURPOSE:To simplify and miniaturize constitution and to facilitate manufacturing by forming a coupling part in common for four waves by a partition conductor plate and a common coupling conductor in common for the four waves with different frequencies, CONSTITUTION:A high frequency current flows on a closed circuit consisting of the common coupling conductor 4, the partition conductor plate 2, a resonator main body 1, a supporting conductor 5, the external conductor of a common coaxial terminal 3, the inner conductor of the coaxial terminal 3, and the coupling conductor 4 by the component EC of an electrostatic vector EH i.e., a magnetic field generated in a direction different from the electrostatic vector by 90 deg. in parallel with the axial direction of the common coupling conductor 4, and the wave f1 is outputted from the coaxial terminal 3. The wave f2 and the waves f3 and f4 inputted via coupling loops 8 and 9 are also outputted from the coaxial terminal 3, which are operated as a cavity resonator in common for the four waves. The magnitude of output from the coaxial terminal 3 can be adjusted by varying the strength of a coupling magnetic field generated in a direction perpendicular to the electric field Ec by varying each insertion length of coupling adjusting elements 141, 142, and 151, 152.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a cavity resonator suitable for use as a component of an antenna sharing device in a base station of a mobile phone, for example.

Conventional technology FIG. 20 is a cross-sectional view showing a cavity resonator developed and proposed earlier by one of the inventors of the present invention, FIG. 21 is a cross-sectional view taken along line A-A in FIG. 20, and FIG. 23 is a sectional view taken along line C-C in FIG. 20, and FIG. 24 is a sectional view taken along line D in FIG. 20.
-D sectional view, in each figure, 27 is the main body of the circular waveguide cavity resonator, 28 is the f, wave or f wave having different frequencies.
The common connecting rod for the four waves, 291, is the ft wave and the f! Common coupling hole for two waves, 30° is f, wave input (or output) coupling loop, 30□ is f, wave input (or output) coupling loop, 3L is tuning capacitance for ft wave Ring, 3
1Y is a capacitive ring for tuning to the f2 wave, and these form a cavity resonator common to the f, wave, and ft wave.

29.4 is a coupling hole common to two waves, f, wave and f4 wave, 3
0, is f, the input (or output) coupling loop for the wave, 304
is the input (or output) coupling loop for f4 wave.

31 is a tuning capacitance ring for the f wave, 314 is a tuning capacitance ring for the f4 wave, and these and the common coupling rod 28 form a cavity resonator common to the f wave and the f4 wave,
As a whole, a cavity resonator that can be used commonly for f1 waves to f4 waves is constructed.

Note that El to E4 are electric field vectors of f waves to f4 waves. (Refer to Japanese Patent Publication No. 54-33509) Problems to be Solved by the Invention In the above conventional cavity resonator, the four-wave common coupling rod 28
, f, wave and f2 wave, and a partition wall with a coupling hole 2934 common to two waves, f, wave, and f4 wave. Since a common joint part is formed in the waves, the structure is relatively complex and large, and manufacturing is difficult.

Means for Solving the Problems The cavity resonator of the present invention has a bottomed cylindrical resonator body having an axial length approximately equal to the wavelength in the tube, and a partition provided at approximately 1/2 the axial length of the resonator body. It is divided into two chambers by a conductive plate, and each chamber is provided with an input/output coupling element, a resonant frequency fine adjustment element, and a mode modification element to form each chamber into a TE111 mode cavity resonator. It is characterized in that it is connected to the common input/output terminal of the partitioned conductive plate via a common coupling conductor having a length of 1/4.

The H-mode and V-mode electric fields generated by excitation with different frequencies through the action input/output coupling terminal can be minimized by adjusting the mode modification element to minimize mutual interference, and by adjusting the resonant frequency fine adjustment element. It resonates at the required frequency, is output through a common coupling conductor, and operates as a cavity resonator that can be shared by four waves.

Embodiment FIG. 1 is a sectional view showing an embodiment of the present invention (H in FIG. 2).
-) 1 sectional view), Fig. 2 is a left side view, Fig. 3 is a right side view, Fig. 4 is an end view taken along line A-A in Fig. 1, and Fig. 5 is an end view taken along line B-B in Fig. 1. 6 is an end view taken along the line C-C in FIG. 1, FIG. 7 is a sectional view taken along line DD in FIG. 1, and FIG.
-E end view, Figure 9 is the F-F end view of Figure 1, Figure 10.
The figures are sectional views taken along the line G-C in Fig. 1. In each figure, 1 is a resonator main body, which is made of a bottomed cylindrical body with an axial length of approximately 1 g (1 g is the wavelength in the tube). Reference numeral 2 denotes a partition conductive plate, which is provided so as to be orthogonal to the central axis of the resonator body l at a location approximately 1/2 of the axial length of the resonator body l. Reference numeral 3 denotes a common coaxial terminal, and as shown in FIGS. 2, 3, and 4, connection portions with external circuits are opened on both left and right sides. Reference numeral 4 denotes a common coupling conductor, which is inserted into a hole made in the outer conductor of the common coaxial terminal 3 and a hole made in the resonator body 1, and has one end connected to the inner conductor of the common coaxial terminal 3, and the other end connected to the inner conductor of the common coaxial terminal 3. It is coupled to a notch provided around the periphery of the partition conductive plate 2, and the length from this coupling point to the connection point to the internal conductor of the common shaft terminal 3 is approximately λg/4. Reference numeral 5 denotes a support conductor for the common coaxial terminal 3. Although the figure shows an example in which the central axis of the common coaxial terminal 3 is supported perpendicularly to the central axis of the resonator body l, it is also possible that both central axes are parallel. 6 is the f1 wave input (or output) coupling loop, and 7 is the f8 wave input (or output) coupling loop.
Wave input (or output) coupling loop, 8 is f3 wave input (
or output) coupling loop, 9 is f4 wave input (or output)
In the coupling loops, the coupling loops 6 and 7 are resonated such that each loop plane is perpendicular or nearly perpendicular to each other, and each loop plane has an angular difference of 45° or approximately 45° from the axial direction of the common coupling conductor 4. The coupling loops 8 and 9 are attached to one end wall of the main body l, and each loop plane is perpendicular or almost perpendicular to each other, and each loop plane is at an angle of 45° or approximately 45° with the axial direction of the common coupling conductor 4. It is attached to the other end wall of the resonator body l so as to have a difference. 10 to 13
are input (or output) coupling terminals, each consisting of, for example, a coaxial terminal.

The figure shows an example in which the input (or output) coupling element for f, wave to f4 wave is formed using a loop, but it is formed using a probe inserted into the resonator main body from the side wall of the resonator main body 1, and each probe The invention can also be practiced if the axial relationship of An arbitrary part may be formed with a loop, and the other part may be formed with a probe.

14 and l'b are coupling adjustment elements, each of which can finely adjust the insertion length into the resonator main body and is made of, for example, a metal screw and a lock nut that can be fixed at the required insertion length, A common coupling conductor 4 is installed on the side wall of the resonator body l separated by a length of approximately λ/4 (L is the free space wavelength) from the resonator body l in the axial direction (to the left when facing the drawing) It is installed parallel or almost parallel to.

15 and 15□ are also coupling adjustment elements, and the coupling adjustment elements 14. and 14□ have exactly the same configuration.

Note that the figure shows a coupling adjustment element 14. and 142 and 15+
and 15g are provided symmetrically to the central axis of the resonator body 1, but the coupling adjustment elements 14° or 14.g. or 15. The present invention can be practiced even if one of these is omitted.

1G and 16□ are f, wave resonant frequency fine adjustment elements,
LL and 17. is a fine adjustment element for the resonant frequency of the f2 wave, 1
8. and 18 yo is f, a fine adjustment element for the resonant frequency of the wave;
19. and lh is a fine adjustment element for the resonance frequency of the f4 wave,
Each of them is made of, for example, a metal screw and a lock nut that can finely adjust the insertion length into the resonator body and can be fixed at the required insertion length, and the distance between both end walls of the resonator body l and the partition conductive plate 2, respectively. That is, the fine adjustment elements 16 and 16. are parallel or nearly parallel to the loop plane of the coupling loop 6, and the fine adjustment elements 17+ and 1. s is parallel or nearly parallel to the loop plane of the coupling loop 7, and the fine adjustment element 18.
and 18m are parallel or nearly parallel to the loop plane of the coupling loop 8, and the fine adjustment element 19. and 19m are provided parallel to or substantially parallel to the loop surface of the coupling loop 9, respectively.

The figure shows a fine adjustment element 16. and 16. 〜19 and x9
This example shows a case in which one pair of fine adjustment elements i are provided on the side walls symmetrical to the central axis of the resonator body l, but one of each pair of fine adjustment elements is omitted and one each is provided. fine adjustment element, for example 16. , 17+, 18° and 19. Some may be formed with a pair of fine adjustment elements and the others with one fine adjustment element, or one of the fine adjustment elements of each pair may be formed with a bimetallic material. Alternatively, some may be formed using a combination of a fine adjustment element and a bimetal, and the other portion may be formed using a combination of fine adjustment elements.

To summarize the above, fine adjustment element 16. and 16□, 17+, and 17m are formed using a pair of fine adjustment elements, one of the pair of elements is formed using a fine adjustment element, and the other is formed using bimetal, 1. The present invention can be carried out by appropriately combining the embodiments in which only the fine adjustment elements are formed.

Fine adjustment element 18. The same applies to 182, 191, and 19□.

20. and 20. ．． 21. and 21□, 22. and 22
．． Reference numerals 231 and 23□ are mode modifying elements, each of which can finely adjust the insertion length into the resonator main body 1 and is made of, for example, a metal screw or lock nut that can be fixed at a required insertion length, and each of which can adjust the insertion length into the resonator main body 1. Provided on the side wall of the resonator main body 1 at a distance between both end walls of the l and the middle partition conductive plate 2, that is, at approximately 1/2 of each resonance length of the cavity resonator formed on both sides of the middle partition conductive plate 2. , modification element 20
．． and 202 and 22. and 22□ are provided parallel or substantially parallel to the common coupling conductor 4, and the correction elements 21. and 21
YO, 23° and 23□ are provided at right angles or approximately at right angles to the common coupling conductor 4.

The figure shows a modification element 20. and 202-23. and 23□
are provided in pairs symmetrically with respect to the central axis of the resonator body 1. However, except for one of the modifying elements in each pair, one modification element is provided in each pair, e.g. 20. ．．
21. , 22. and 23t may be provided (
, some may be formed using a pair of correction elements and others may be formed using a single correction element, or either one of each pair of correction elements may be replaced with a bimetal,
Alternatively, some may be formed by a combination of correction elements, and the other part may be formed by a combination of correction elements and bimetals, and further, either a correction element parallel to the common coupling conductor 4 or a correction element perpendicular to the common coupling conductor 4 may be formed. The present invention can be practiced even if all of them are omitted.

To summarize the above, the modification element 20. and 2h and 21
．． and 212, a mode in which it is formed with a pair of modifying elements, a mode in which one of the pair of elements is formed with a modifying element and the other is formed with a bimetal,
A mode in which only one modification element is formed, a pair of modification elements 20. and 20. or 21, and 21. For example, by omitting one pair of 20. and 20. The present invention can be carried out by appropriately combining modes in which only one pair of the above is used.

Modifying element 22. The same applies to 22□, 231 and 23□.

In the above, the mode modification element and the resonant frequency fine adjustment element are provided on the side wall of the resonator body corresponding to approximately the corner of each resonance length of the one-mode cavity resonator. In this example, a configuration is shown in which the mode modification effect and the resonant frequency adjustment effect can be maximized; however, the present invention can also be practiced by providing the resonator at a location appropriately shifted in the axial direction of the resonator body. .

In the cavity resonator of the present invention configured in this manner, for example, when an f1 wave is inputted through the coupling loop 6, an electric field El (H mode) is generated within the cavity resonator, and an ft wave is transmitted through the coupling loop 7. When input, an electric field Ev (V mode) is induced within the cavity resonator.

Mode modification element 20. and 20□ and 21. and 21
By appropriately adjusting each insertion length of s, coupling loss due to interference between H mode and V mode can be minimized, and the resonant frequency fine adjustment elements 16 and 16□, 171 and 17. By adjusting each insertion length appropriately, it is possible to cause the f1 wave and f2 wave to resonate correctly.

In addition, if a part of the mode modification element, a part of the resonant frequency fine adjustment element, or each part of the mode modification element and the resonant frequency fine adjustment element is replaced with a bimetal, the Changes in the resonant frequency due to expansion or contraction deformation of the resonator body 1 can be automatically compensated for, and resonance can always be achieved at a desired frequency.

A magnetic field generated in a direction 90° different from the component electric field vector EC1 of the electric field vector E8, that is, the electric field vector parallel to the axial direction of the common coupling conductor 4, causes the common coupling conductor 4, the partition conductive plate 2, the resonator body 1, and the support A high frequency current flows through a closed circuit consisting of the conductor 5, the outer conductor of the common coaxial terminal 3, the inner conductor of the common coaxial terminal 3, and the common coupling conductor 4, and the fl wave is output from the common coaxial terminal 3.

T2 wave and T input via coupling loops 8 and 9
Similarly, common coaxial terminal 3 is used for 3 waves and T4 waves.
It operates as a four-wave cavity resonator.

and coupling adjustment element 14. and 14m and 15+ and 15. By changing the respective insertion lengths, the strength of the coupling magnetic field generated in the direction perpendicular to the electric field can be changed, and the magnitude of the output from the common coaxial terminal 3 can be adjusted.

According to the experimental results of the prototype, the coupling adjustment elements 14 and 14. In addition, the adjustment effect can be maximized by selecting the mounting location of 15+ and 15n on the side wall of the resonator body 1, which is approximately λ/8 apart from the partition conductive plate 2 in the axial direction of the resonator body 1. was completed.

The common coupling conductor 4 is formed to have an axial length of approximately λg/4, so that the impedance seen from the resonator side from the coupling point between one end of the common coupling conductor 4 and the internal conductor of the common coaxial terminal 3 becomes infinite. Since it is normalized, it is possible to eliminate the possibility that high frequency power (voltage) from an external circuit is blocked by the common coupling conductor 4 and has an adverse effect.

In the cavity resonator of the present invention as well, the following equations hold true as in general circular waveguide resonators.

λc=1.706D ・ ・ ・ ・ (2) (l−(λ/λC)) Here, λ: Free space wavelength f: Any transmission frequency λC: Cutoff wavelength D=Diameter of resonator body l fc: Cutoff Frequency and unloaded Q (Quc) when the cavity resonator of the present invention is formed of copper or a material whose surface treatment is performed by copper plating is:
As in the case of general circular waveguide resonators, it is obtained from a linear equation.

In the above equation, the unit of the diameter of the resonator body 1 is open, and the unit of the cutoff frequency fc and arbitrary transmission frequency f is GHz.

Note that the actual no-load Q value is determined by high frequency losses in the connection between the resonator main body l and the middle partition conductor 2, the connection between the middle partition conductor 2 and the common coupling conductor 4, various adjustment elements, etc. , approximately 60% of the theoretical value determined by equation (5).

The resonant frequency of H mode in the cavity resonator of the present invention is fl
and fl, the resonance frequency of the ■ mode is f! and T4,
The impedance of each resonant circuit for f, to f4 is set to 2.
1 to z4. Reactance component is X, or resistance component is rl to T4, input/output terminals of each resonant circuit, that is, terminals corresponding to coaxial terminals IO to 13 in FIGS. 2 and 3, T1 to T4, individual output terminals. When the load connected to TI to T4 is expressed as RL=1, and the common terminal corresponding to the common coaxial terminal 3 in FIG. 1 is expressed as Tc, the equivalent circuit of the cavity resonator of the present invention is shown in FIG. 11.

The impedance z1 to z4 of each resonant circuit is Zi++, each reactance is Xms, each resistance is rks, each admittance is Y11%, the load Q of each resonant circuit is QLk, the no-load Q is Q□, the resonant frequency is f, (k =1 to 4) and let Yc be the admittance looking into each resonant circuit from the common terminal Tc, these relationships are expressed by the following equations.

2d = r, + j2xm ・ ・ ・ ・ ・ (8) Yc"ΣYk... (10) In addition, the voltage reflection coefficient 1"c and the reflection loss Rc at the common terminal T are respectively expressed by the following formulas. expressed.

It can be shown similarly to the figure.

In FIG. 12, T2 to T4 are admittances of each resonant circuit, and other symbols are the same as in FIG. 11.

As mentioned above, if the impedance of an arbitrary resonant circuit among the four resonant circuits is expressed by Zk, the combined admittance Ykt of the other resonant circuits excluding this arbitrary resonant circuit is L, c = 20I2og lr' cl...
・(12) Keep any input/output terminal, for example, T+ open, and apply a load Rt to each of the other input/output terminals T to T4.
, =1 is connected, an equivalent circuit between the input/output terminal T1 and the common terminal Tc is shown in FIG.

Any input/output terminal among the input/output terminals T2 to T4 is kept open, and a load RL=1 is applied to each of the other input/output terminals.
Since the equivalent circuit between the common terminal Tc and the input/output terminal kept open when the terminals are connected can also be found using the valve cylinder 12, the basic matrix of the circuit between any input/output terminal T and the common terminal Tc [Fk] is calculated using the following formula.

・ ・ ・ ・ (14) From the equation (14), the transmission characteristic Lm-0 and impedance characteristic Z between the arbitrary input/output terminal T and the common terminal Tc in the cavity resonator of the present invention are expressed by the equation (15) and the impedance characteristic Z, respectively. (16
) can be obtained from the formula.

Fig. 13 is a front view showing an example of a shared device such as an antenna constructed using the cavity resonator of the present invention, and Fig. 14 is a side view thereof. In the cavity resonator, 25 is a common line, for example, between the common coaxial terminals 3 and the antenna connection terminal 2 in the cavity resonator of the present invention.
6 and the common coaxial terminal 3 in the first cavity resonator of the present invention
It consists of a coaxial line interposed in between.

Fig. 15 is an equivalent circuit diagram of the antenna sharing device shown in Figs.
A is an antenna connection terminal.

Cavity resonator 24. When connecting common coaxial terminals at angles between 24° and 24° with a transmission line with a length of nλg/2,
Because the subscript k in equations (6) to (10) can be extended to n due to the synchronicity of the characteristics of the transmission line, the first
The voltage reflection coefficient, return loss, and transmission characteristics between any input/output terminal T and the antenna connection terminal TA in Figure 5 are extended to the subscript k '4tn in equations (6) to (15). By doing so, it can be obtained using the same method.

Effects of the Invention In the cavity resonator of the present invention, four
4 by means of a common dividing conductor and a common coupling conductor for the waves.
Since a common coupling part is formed for the waves, the structure is simpler and smaller than the conventional one, and manufacturing is easy.

Furthermore, when constructing a shared device such as an antenna using the cavity resonator of the present invention, four resonant circuits can be connected to one branch point, so the total length of the transmission line can be reduced compared to the number of resonant circuits. The length can be shortened, and deterioration of electrical characteristics can be suppressed.

Figure 16 shows 1 and 5 in the prototype of the cavity resonator of the present invention.
It is a curve diagram showing an example of transmission characteristics in the GHz band, that is, transmission characteristics between four input/output terminals and a common terminal, where the horizontal axis is the transmission frequency f (GHz) and the vertical axis is the attenuation amount L (dB).

FIG. 17 is a curve diagram showing an example of the return loss characteristics in the above prototype and frequency band, that is, the return loss characteristics at the common terminal, where the horizontal axis is the transmission frequency f (GHz), and the vertical axis is the return loss t, c ( dB).

As is clear from both figures, the characteristics of the cavity resonator of the present invention closely match the theoretical values and are extremely good.

FIG. 18 shows an 8
16 is a curve diagram showing an example of the transmission characteristics of a prototype channel sharing device; the horizontal and vertical axes are the same as in FIG. 16; FIG.

As is clear from the figure, the insertion loss of the shared device is extremely small and exhibits good transmission characteristics.

FIG. 19 is a curve diagram showing an example of the reflection characteristics of the shared device, in which the horizontal and vertical axes are the same as in FIG. 17, indicating that each channel has a large reflection loss and good matching.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing one embodiment of the present invention, FIGS. 2 and 3 are side views, FIG. 4 is an end view taken along the line A-A in FIG. 1, and FIG. 5 is a line B-- B end view, Figure 6 is a CC end view in Figure 1, Figure 7 is a DD sectional view in Figure 1, Figure 8 is an E-E end view in Figure 1, and Figure 9 is a FF end view of Fig. 1, No. 10
The figure is a sectional view taken along line G-C in FIG. 1, FIGS. 11 and 12 are equivalent circuit diagrams of the cavity resonator of the present invention, and FIG. A front view showing the device, FIG. 14 is a side view thereof, and FIG. 15 is an equivalent circuit diagram thereof.
FIG. 16 is a curve diagram showing an example of the transmission characteristics of the cavity resonator of the present invention, FIG. 17 is a curve diagram showing an example of the reflection loss characteristics of the cavity resonator of the present invention, and FIG. 18 is a curve diagram showing an example of the transmission characteristics of the cavity resonator of the present invention. Curve diagram illustrating an example of transmission characteristics of a shared device including a device as a component, 1st
FIG. 9 is a curve diagram showing an example of the return loss characteristics of a shared device constructed using the cavity resonator of the present invention, FIG. 20 is a cross-sectional diagram showing a conventional cavity resonator, and FIG. 22 is a sectional view taken along line BB in FIG. 20, FIG. 23 is a sectional view taken along line C-C in FIG. 20, and FIG. 24 is a sectional view taken along line DD in FIG. : Resonator main body, 2: Partition conductive plate, 3: Common coaxial terminal, 4: Common coupling conductor, 5: Support conductor, 6 to 9: Human power (or output) coupling loops 111O to 13:
Input (or output) terminals, 141'+14. 15+ and 153: coupling adjustment element, 16. , 16s
. 17, ,17. , Ill, , 18. , 19
．． and 198: resonant frequency fine adjustment element, 20*,
20*, 211.21g. 22+, 22m, 2L and 23. : Mode modification element, 24 to 24n=Cavity resonator of the present invention, 25: Common line, 26: Antenna connection terminal, 27: Resonator body, 2
8: Common connecting rod, 29. , and 2914: common coupling hole, 301°30m, 30. and 304: input (or output) coupling loop, 31+, 31g, 31s
and 314: Capacity rod for tuning.

Claims (11)

[Claims] (1) The inside of the bottomed cylindrical resonator body, which has an axial length approximately equal to the tube wavelength, is divided into two chambers by a partition guide plate installed at approximately 1/2 of the axial length, and each chamber is divided into two chambers. An input/output coupling element, a resonant frequency fine adjustment element, and a mode modification element are provided to form each chamber into a TE_1_1_1 mode cavity resonator, and a common coupling conductor having a length of approximately 1/4 of the tube wavelength is provided. A cavity resonator characterized in that said partition conductive plate is connected to a common input/output terminal. (2) The inside of the bottomed cylindrical resonator body, which has an axial length approximately equal to the wavelength in the tube, is divided into two chambers by a partition guide plate installed at approximately 1/2 of the axial length, and each chamber is divided into two chambers. An input/output coupling element, a resonant frequency fine adjustment element, and a mode modification element are provided to form each chamber into a TE_1_1_1 mode cavity resonator, and a common coupling conductor having a length of approximately 1/4 of the tube wavelength is used. The partitioned conductive plate is connected to a common input/output terminal, and approximately 1/1/2 of the free space wavelength is connected to the partitioned conductive plate to a common input/output terminal.
A coupled electric field adjusting element made of a rod-shaped conductor is inserted into each of the TE_1_1_1 mode cavity resonators from the side wall of the bottomed cylindrical resonator main body separated by a length of 4 or less, and the axial direction of this coupled electric field adjusting element is A cavity resonator characterized in that the cavity is made substantially parallel to the common coupling conductor. (3) The input/output coupling element provided in each TE_1_1_1 mode cavity resonator consists of two loops provided on each end wall of each TE_1_1_1 mode cavity resonator, and one of the two loops The loop plane of the loop has an angular difference of approximately +45° with respect to the axial direction of the common coupling conductor, and the loop plane of the other loop has an angular difference of approximately −45° with respect to the axial direction of the common coupling conductor. The cavity resonator according to claim 1 or 2. (4) The input/output coupling element provided in each TE_1_1_1 mode cavity resonator consists of two probes provided on each side wall of each TE_1_1_1_1 mode cavity resonator, and one of the two probes The axial direction of the probe has an angular difference of approximately +45° with respect to the axial direction of the common coupling conductor, and the axial direction of the other probe has an angular difference of approximately −45° with respect to the axial direction of the common coupling conductor. The cavity resonator according to claim 1 or 2. (5) The resonant frequency fine adjustment element provided in each TE_1_1_1 mode cavity resonator is inserted into the resonator body from a side wall location approximately half the resonance length of each TE_1_1_1_1 mode cavity resonator, and is inserted into the resonator body in the axial direction. The cavity according to claim 1 or 2, comprising four rod-shaped conductors having angular differences of approximately +45°, approximately −45°, approximately +135°, and approximately −135° with respect to the axial direction of the common coupling conductor. resonator. (6) The resonant frequency fine adjustment element provided in each TE_1_1_1 mode cavity resonator is inserted into the resonator body from a side wall location approximately half the resonance length of each TE_1_1_1_1 mode cavity resonator, and is inserted into the resonator body in the axial direction. a rod-shaped conductor having an angular difference of approximately +45° or approximately -135° with respect to the axial direction of the common coupled conductor, and a rod-shaped conductor whose axial direction is approximately -45° or approximately with respect to the axial direction of the common coupled conductor. The cavity resonator according to claim 1 or 2, comprising a rod-shaped conductor having an angular difference of +135°. (7) The mode modification element provided in each TE_1_1_1 mode cavity resonator is inserted into the resonator body from a side wall point approximately half the resonance length of each TE_1_1_1 mode cavity resonator, and the axial direction is common. The cavity resonator according to claim 1 or 2, comprising a rod-shaped conductor substantially parallel to the axial direction of the coupling conductor. (8) The mode modification element provided in each TE_1_1_1 mode cavity resonator is inserted into the resonator body from a side wall point approximately half the resonance length of each TE_1_1_1_1 mode cavity resonator, and the axial direction is common. The cavity resonator according to claim 1 or 2, comprising a rod-shaped conductor substantially perpendicular to the axial direction of the coupling conductor. (9) The mode modification element provided in each TE_1_1_1 mode cavity resonator is inserted into the resonator main body from a side wall point approximately half the resonance length of each TE_1_1_1_1 mode cavity resonator, and the axial direction is common. The cavity resonator according to claim 1 or 2, comprising a rod-shaped conductor whose axis is substantially parallel to the axial direction of the coupling conductors and a rod-shaped conductor whose axial direction is substantially perpendicular to the axial direction of the common coupling conductor. (10) The inside of the bottomed cylindrical resonator body, which has an axial length approximately equal to the wavelength in the tube, is divided into two chambers by a partition guide plate installed at approximately 1/2 of the axial length, and each chamber is divided into two chambers. An input/output coupling element, a resonant frequency fine adjustment element, and a mode modification element are provided to form each chamber into a TE_1_1_1 mode cavity resonator, and a common coupling conductor having a length of approximately 1/4 of the tube wavelength is provided. A cavity resonator formed by connecting the partitioned conductive plate to a common input/output terminal is connected to nλg in the common line.
A shared device characterized in that it is connected to every branch point at intervals of /2 (n is any positive integer, and λg is the wavelength in the pipe). (11) The inside of the bottomed cylindrical resonator body, which has an axial length approximately equal to the wavelength in the tube, is divided into two chambers by a partition guide plate installed at approximately 1/2 of the axial length, and each chamber is divided into two chambers. An input/output coupling element, a resonant frequency fine adjustment element, and a mode modification element are provided to form each chamber into a TE_1_1_1 mode cavity resonator, and a common coupling conductor having a length of approximately 1/4 of the tube wavelength is used. The partition conductor plate is connected to a common input/output terminal, and approximately 1 of the free space wavelength is connected from the partition conductor plate to a common input/output terminal.
A coupled electric field adjusting element made of a rod-shaped conductor is inserted into each of the TE_1_1_1 mode cavity resonators from the side wall of the bottomed cylindrical resonator main body separated by a length of /4 or less, and the axial direction of this coupled electric field adjusting element is A cavity resonator made almost parallel to the common coupling conductor is connected to each branch point of the common line at an interval of nλg/2 (n is any positive integer, λg is the channel wavelength). Features shared equipment.